Sherlock Holmes clapped his hands softly together and chuckled.
"'Pon my word, Watson, you are coming along wonderfully. You have
really done very well indeed. It is true that you have missed
everything of importance, but you have hit upon the method, and
you have a quick eye for colour. Never trust to general
impressions, my boy, but concentrate yourself upon details. My
first glance is always at a woman's sleeve. In a man it is
perhaps better first to take the knee of the trouser. As you
observe, this woman had plush upon her sleeves, which is a most
useful material for showing traces. The double line a little
above the wrist, where the typewritist presses against the table,
was beautifully defined. The sewing-machine, of the hand type,
leaves a similar mark, but only on the left arm, and on the side
of it farthest from the thumb, instead of being right across the
broadest part, as this was. I then glanced at her face, and,
observing the dint of a pince-nez at either side of her nose, I
ventured a remark upon short sight and typewriting, which seemed
to surprise her."
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